Spraying device



July 5, 1938. w. M. VOGEL' 2,123,029,

SPRAYING DEVICE Filed Dec. 28, 1957 lNVENT OR TORNEY Patented July 5,1938 UNITED STATES PATENT OFFICE 5 Claims.

This invention relates to spraying devices or atomizers of the characteremployed for insecticides or similar liquids, and the object of theinvention is to provide means by which the spraying action of suchdevices will be greatly improved without increasing the manufacturingcost of the sprayers.

In the patent to Fitch, No. 1,891,325, dated December 20th, 1932, isshown a type of sprayer over which the present invention is animprovement. In that patent the desirability of forming a suction orsiphon tube with aligned apertures or openings of different diameters ispointed out. The present invention relates to further improving astructure of the character shown, by a novel formation of the alignedsuction or siphon tube openings whereby greatly improved sprayingperformance is attained.

More particularly, the invention contemplates the provision of a suctionor siphon tube having an outer large opening and an aligned innersmaller opening, both of said openings being preferably simultaneouslyformed by operation of a conical-ended punch or similar tool, theformation of said aligned openings resulting in the displacement ofportions of the metal body of the tube, to cause said displaced portionsto form annular, frustro-conical walls thereby causing the aligned sprayopenings to be of increased length or depth without requiring theutilization of metal of increased thickness for the formation of thesuction or siphon tube. This has been found by actual test to greatlyimprove the atomizing or spraying action of the device.

In the accompanying drawing, wherein an embodiment of the invention isshown, Fig. 1 is a sectional view of the end of a spraying device,showing the formation of the aligned spray openings; Fig. 2 is a frontelevation of the upper portion of the suction or siphon tube; Fig. 3 isa sectional view on the line 3-3 of Fig. 1, looking in the direction ofthe arrows; and Fig. 4 is a sectional view of the upper portion of aspray 'or siphon tube, showing the manner in which the aligned sprayopenings are simultaneously formed by a conical-ended punch or similartool.

In the drawing I0 indicates an elongated cylinder of the kind commonlyemployed in spraying devices of this character, said cylinder containingthe conventional piston to which is secured the operating rod andattached handle. The forward end of cylinder I0 is closed by the cuppedhead II formed with the central aperture I6 through which an air blastis forced by movement of the piston within cylinder Ill.

The suction or siphon tube I2 is shown as being of substantiallyrectangular form in cross section so as to provide a front wall I and arear wall 8. This tube has its lower portion disposed within a fluidreceptacle or tank, not shown, but secured to the lower front portion ofthe cylinder in the conventional manner; The upper portion of thesuction or siphon tube is disposed in front of the air outlet I6 in thehead I I, as clearly shown in Fig. 1, said upper portion of the tubebeing secured to the head II by means of solder 9 or any suitableequivalent means.

The top end of the tube I2 is closed as indicated at I3, and below theclosed top end I3 there is provided transversely through the front wallI of the tube, a spray-discharge opening I4. In the rear wall 8 of thetube there is provided an air blast opening I5, located in horizontalalignment with the opening I4 and also in alignment with the airdischarge outlet I6. The three openings I4, I5 and I6 are provided inhorizontal axial alignment, and the central opening I5 is preferablysmaller than those shown at I4 and I6, the advantages of such anarrangement of differently sized openings being fully pointed out in thepatent to Fitch, No. 1,891,325, herein referred to.

According to the present invention, the aligned openings I l and I5 inthe walls I and 8 of tube I2 5 are so formed that an annular,frustro-conical wall portion or flange extends rearwardly from each ofsaid openings. Said wall portion or flange is shown extending rearwardlyin the tube from opening M as at I! and a similar wall portion I8extends rearwardly from the opening I5. The air outlet It can also beformed, if desired, with a similar wall portion or flange as shown atI9. The aligned openings I4 and IS in tube l2 can be simultaneously andaccurately formed by the use of a conical-ended punch or similar tool,such as shown at 20 in Fig. 4. A blow of the punch not only forms bothopenings simultaneously and in proper alignment, but it forms themautomatically of proper relative size, with that shown at I5 smallerthan that shown at I4. By the formation of these openings in the mannerjust described, the metal of the tube walls is displaced and forcedrearwardly or laterally of the tube walls to produce the desired annularwalls or 1 flanges I1 and I8 which project from the respective openingsI4 and I5. The formation of these walls or flanges IT, IS, IS! causeswhat would be a normally shallow opening in the relatively thin walls ofthe tube and head II to become greatly increased in depth and to assumeconical formation for its depth. This arrangement is attained Withoutthe use of heavier metals for the formation of the tube and head H andexhaustive tests show that a very great increase in spraying efliciencyresults when the openings are formed as described.

While I have herein suggested the formation of the openings I4 and I5 bycertain methods of manufacture, it will be understood that other methodsmay also be followed to produce the desired structure, without departingfrom the spirit of the invention. I have also shown the walls 1 and 8 ofthe tube L2, as well as the head ll, each provided with a singleopening, and wish to be understood as not limiting my invention thereto,as it will be readily understood that these elements may be providedwith several openings, and other changes may be made within the'scope ofthe invention as comprehended by the annexed claims.

What I claim is:

1. In a sprayer of the character described, a siphon tube having alignedopenings one of which constitutes aspray opening and the other an airblast opening, one of said openings being larger than the other, each ofsaid openings being surrounded by a conical flange portion extendinglaterally from the walls of the tube body, both of said flangesextending in the same direction.

2. In a sprayer of the character described, a siphon tube having alignedopenings extending transversely through it, the metal displaced out ofsaid openings by the formation of the same constituting an annular,conical flange extending laterally from each opening, said flanges onthe openings extending in the same direction.

3. In a sprayer of the character described, a cylinder having an endmember, said end member being provided with an airblast opening, themetal displaced out of said opening by the formation of the same formingan annular conical flange extending rearwardly from the opening, asiphon tube having an end portion located in front of said opening, saidtube having walls formed with aligned openings in registration with theopening in the cylinder end member, the tube openings having rearwardlyextending conical flange portions consisting of metal displaced from thetube walls.

4. In a sprayer of the character described, a siphon tube having a pairof aligned openings extending through its walls, one of said openingsbeing formed with a conical, annular flange extending around it andprojecting rearwardly from it and located within the tube, the otheropening having a similar flange extending laterally from the tube wallin which it is formed and projecting externally of the tube, one of saidopenings being larger than the other.

5. In a sprayer of the character described, a siphon tube having alignedspray openings, one of said openings being larger than the other, eachof said openings being defined by a conical, annular wall portioncomposed of metal distorted laterally from the tube walls whereby theeffective depth of each of said openings is greater than the thicknessof the metal of which the walls of the tube are made, the smaller end ofone of the openings being directed toward the larger end of the otheropening.

WILLIAM MARTIN VOGEL.

